/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/ITextInputMethodSystem.h
Unregisters an implemented context interface object with the system. Editable text should call this method before destroying an implemented context interface object.
void UnregisterContext ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [ITextInputMethodContext](API\Runtime\ApplicationCore\GenericPlatform\ITextInputMethodContext) > & Context )